He is the first two-time StarCraft II World Championship Series winner, claiming the title in 2013 and 2015.

Kim spent most of his career playing for the Jin Air Green Wings team, from 2013–2020.

In 2013, sOs beat Lee Jaedong at the World Championship Series (WCS).

In September 2021, sOs announced his retirement from StarCraft on Team NV's Instagram.

[4] For example, at the finals of IEM Katowice 2014, sOs opened with the extremely high-risk proxy gateways (placing production buildings in the opponent's own base) strategy twice in a row in a best of seven against herO (Kim Joon-Ho) and won both games with it, and won the entire series 4–1.